The Encyclopedia Americana Ensiklopedia sosialisme /S. Surjountoro New standard encyclopedia / editor in chief, Douglas W. Downey An Encyclopedia of world history / Willvan Z. Longer Ensiklopedia populer politik pembangunan Pancasila /A. Heuken ... [et al.] The encyclopedia of classical mythologyAl-Miftah Ma Rifat Islam Wa Al-ImanSyarah Ma, Rifat Al Islam WA Al - ImanMcGraw-Hill encyclopedia of science & technologyA Dictionary of twentieth century world biography / consultant editor, Asa Briggs ; editor, Alan Isaacs, Elizabeth Martin, David Pickering